si può fare usando un MIX THR-THR, se cerchi in rete trovi la spiegazione passo passo......
te la posto io così non devi cercare:
The fix is to mix throttle against throttle, triggered by the switch of your choice.
Hold down Select and Scroll Down, and switch on Tx.
Use Increase/Decrease buttons to select a vacant memory.
Press Select and Scroll Down to go into normal mode, then again to go into programming.
Press Select and Scroll Up to bring up the Menu list.
Scroll to a Mix (I used Mix 2, as Mix 1 is doing something else on mine).
Press Select and Scroll Down to select the mix - it will probably read Inh.
Press increase or decrease to enable the mix.
The Select button will take you down the page to modify settings.
Top line, use Increase/Decrease to set Thro master/Thro slave.
Next lines - Rate - set minus 100% with throttle at top and bottom of throw.
Next line - SW: - set to Mix (or your preferred switch).
Last line - Offset - set to minus 100%.
Now scroll through all the mixes and menu items (Up switch) to get to the servo monitor screen.
You should have full throttle movement with the Mix (Rudder dual rate) switch pushed away from you, and zero throttle with no movement with the switch pulled towards you. If you are using this switch for dual rates, use the Flap switch instead as your mix trigger.